David Bardsley
Business Development, Ellington-DTD
David Bardsley P.G. has over thirty-six years of environmental drilling experience working in a variety of settings across the United States. Mr. Bardsley earned a Bachelor of Science degree in Geology & Geophysics along with a Communications Minor (1984) from the University of Missouri-Rolla. He started his career as a drill rig helper advancing through various technical and managerial positions in both small and large drilling companies. He was an early leader in the use of horizontal drilling to solve environmental and water supply challenges and has authored/co-authored over twenty papers on horizontal environmental drilling methodology. David has been directly involved in the design and oversight for the installation of hundreds of horizontal environmental and water supply wells.
He is a licensed well driller in Texas, Arizona and Louisiana and holds RG/PG certifications in Texas, Missouri, Louisiana and Tennessee. Mr. Bardsley is a strong proponent of education and has served as a short course instructor at Battelle environmental conferences and University of Wisconsin Madison along with presenting environmental drilling training to students at University of Arizona and University of Louisiana Lafayette.
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Ash Basin Water Solutions Utilizing Horizontal Directional Well Installations
Horizontal directional drilling for non-traditional applications has its roots in the 1930’s oil field technology. In the 1970’s, the “river crossing” or HDD technology started in the central valley of California. In the late 1980’s a combination of oil field and river crossing technologies were utilized for environmental remediation activities. Since that time, HDD has been utilized for a wide variety of uses outside the traditional utility and pipeline industries. Nearly all environmental remediation remedies can be applied using HDD technology, however, successful uses of HDD for non-traditional activities requires proper engineering design along with an understanding of subsurface geologic conditions.
Coal combustion product (CCP) basins can leach contaminants into the groundwater. Horizontal wells have relatively recently begun to be utilized to mitigate liability created by large CCP basins.
In one application in the north central US, a horizontal dewatering well was installed in dry stacked ash basin to control the buildup and discharge of leachate from the basin. The well successfully lowered leachate levels and prevented uncontrolled discharge of fluids from the basin.
In another application, eight horizontal wells were installed at northern plains power plant. The wells are being used to inject or withdraw groundwater to control migration of leachate contaminated groundwater from the site.